At the mention of all shellfish, perhaps, in the first place remember the common snails, and someone - gastronomic delights.Meanwhile, it is a particular type of animal, including a very large number of species, it is not similar to each other, including sea scallops.What it is, or rather who will understand in more detail.
Bivalves: class description
second class name - lamellibranch.Bivalves in the world quite a lot, about 20 thousand species.They are not bad adapted to both fresh and salt water.Compared to other members of this class of mollusks - sedentary benthic inhabitants of ponds.They have a flattened body, enclosed in a shell consisting of two valves.Most have very well-developed gills (ctenidium) having a plate-like shape (hence the name of the class), they function not only of the respiratory system, but also a kind of filter.Mainly bivalves - inactive residents bottom.They are buried in the mud to escape from predators, stuck to rocks and other surfaces.Some are able to short active movement, such as sea scallops.What it is, or rather someone, find out more.
shells of bivalve molluscs, as well as other, formed of calcium carbonate (CaCO3).In form they are two doors, which are identical in size, that are connected by using a protein ligament (ligament).
Scallops sea: what is it?
This large group of mollusks, is included in a separate family of the same name.They belong to a class lamellibranch.Habitat of its representatives is large enough.They exist in almost all the oceans and seas, absolutely at different depths.Especially different species richness of water subtropical and temperate zones.In Russia, these mollusks are found mainly in the Sea of Japan, as well as in the Bering, Okhotsk, Chukotka.
Scallop: description
How are scallops (photos can be seen in the article) know, perhaps, everything.It is not enough that they are very popular in cooking, their shells are very popular souvenir brought from voyages.A characteristic feature of the external structure of a sink with doors, a little different in size and having "ears."This is a special area behind and in front of the top.The upper flap is flatter than the lower.Shell surface is usually decorated with a radial or concentric convex pattern (rib).Very often, they have a different kind of thorns or scales, which gives even more decorative.Shell color can be different, depending on the habitat and of what species belongs to the mollusk.Scallop on the type of food - filtrovalschik.Small clam (4 cm diameter) is capable for one hour to filter about 3 liters of water.
moving the scallops?
representatives Scallops family - one of the few bivalves, which are capable of active swimming.They do this in two ways.In the first case clam moves forward edge of typhoid, while periodically shells slamming doors.The reason is as follows.The water collects in the mantle cavity, which is at all molluscs have it, and the sea scallops.What is it you can tell from the name.The special cavity, which is limited to the outside of the mantle (the fold of the body), and inside the body of the mollusk.The water can not go through the abdominal region.She is thrown in front of and behind the dorsal region.As a result, there is jet thrust that pushes forward the mollusk.Some of the water flows down to the ventral edge.As a result of the interaction of countervailing forces scallops moved to the bottom of spasmodic movements (up and forward).
second option mollusk movement used in times of danger or sudden action of a stimulus.In this case, hanging from the edge of the shell mantle quickly drawn in, and the water is freely discharged through the abdominal region.Scallop thus makes a sharp leap forward and a long (up to half).In nature, these mollusks are many natural enemies, such as starfish.This method of movement is very often saves from predators and is defensive in nature.
Types scallops
This family molluscs numerous enough, so focus on the most known types of fishing in our country.
- Icelandic scallops.Enough large species, scallops reach a size of 8-10 cm, and the maximum recorded weight - 600 grams, but more often it does not exceed 150, the algae feed on plankton that filters out from the water column.Habitat - waters of the Arctic and North Atlantic.Muddy bottom not like, he prefers sandy, on which is deposited or form colonies on the rocks.
- scallop seaside.Sink Dimensions - 20 cm in diameter.Is white and radially spaced ribs.Habitat - sea waters off the coast of Sakhalin and Kamchatka.
- Black Sea Scallop.The only species that lives in the waters of the Black Sea.It is small size, shell diameter reaches 5 cm and has a bright color (yellow, pink, orange).The depth at which it occurs, - 50-60
Nutritional value Scallops
marine mollusk, whose names are familiar to all (scallops, mussels, oysters and so on. D.), Eat withancient times.It is known that they are actively caught and even bred in the Roman Empire.The usefulness of this product is indisputable for many reasons.Firstly, the scallop meat by 38% consists of protein, it's a good alternative to the usual pork or beef.In addition, it is low-calorie, (100 g only 88 kcal), therefore, and indeed all the clams (names, see above) is often recommended for people suffering from obesity, or stick to a diet.Secondly, scallop meat contains a lot of different macro and micro elements, including sulfur, molybdenum, zinc, nickel, and vitamins, such as PP.Just enough to overshadow all the high price of this product.It is due, above all, the difficulty of obtaining, and the food is actually only a small part of the clam - muscle-contactor (about 30% of the total mass).
